Pivot-hinge.



F. E. LARSGHEID, F. W. CARLSON 8L1. FIRNER.

PIVOT HINGE.

APPLlCATlON FILED SEPT. 28, 1 914.

Patented Dec. 7, 1915.

2 SHEETS-SHEET 2.

BY THE/R ATTORNEYS Mam MM I oLumnlA PLANOGRAPH co..WAsmN 00000000 rarer ni rite.

FRANK E. LAasoHEIn, or MINNEAPOLCES, AND rennet-tron W. CARLSON, on em. PAUL, MINNESOTA, AND JOSEPH FIRNER, or PRESCOTT, WISCONSIN.

PIVOT-HINGE.

To all whom it may concern:

Be it known that we, FRANK E. LAR- scrrnrn, citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, FREDERICK W. OARLSON; citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, and J OSEPI-I FIRNER, citizen of the United States, residing at Prescott, in the county of Pierce and State of Wisconsin, have invented certain new and useful Improvements in Pivot-Hinges; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. a 7

()ur invention has for its object to provide an improved center pivot hinge for swinging window sashes; and, to this end, it consists of the novel devices and combinati ons of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1- is a view of a window sash and frame, in vertical section, taken on the line 00 00 of Fig. 2, said sash being frame by a pair of the horizontal swinging movement,

dow sash being open; Fig. 2 is a horizontal section, taken on the line 00 m with the window closed; Fig. 3 is a face view of the frame plate shown in Fig. 1, some parts of the window frame being broken away Fig. 4. is a face View of the sash plate shown in Fig. 1, some parts of the sash being broken away; Fig. 5 is a face view of the frame plate shown in Fig. 1, removed from the window frame and also showing, in section, and broken lines, the cooperating sash plate inits two extreme positions; Fig. 6 is a detail View, in section, taken on the irregular line m w of Fig. 3; Fig. 7 is a detail view, in section, taken on the line 09 m of Fig. 4; and F ig, 8 is a detail view, in section, taken on the line 00 m of Fig. 2. v V

The numeral 1 indicates a window frame designed fora sash mounted on center pivots for horizontal swinging movement, and provided with the customary inner and of Fig. 1,

Specification of Letters Patent. Application filed September 28, 1914.

supported from said; improved hinges, for

extending u d b t work close together,

' Patented Dec. 7, 1915. Serial No. 863,869.

outer stops 2 and 3, respectively. mit this swinging movement of the it is necessary to terminate the short of the pivotal. supports for said sash, leaving an open space around said supports, between the sash and frame, through which the wind, dust, snow and rain may drive. Among various other improvements, our iniproved hinge is designed to completely close such openings, at the same time permitting the sash to be readily removed from the frame, without the use of any tool whatsoever or without removing any of the parts of the hinge from either the sash or frame. Each pair of the improved pivot hinges plate!) and a cooperating sash plate 6. Both plates 5 and 6 are set into the window frame and sash, respectively, so as to lie flush therewith, and are secured in position by wood screws, the heads of which are countersunk in said plates. It is, of course, understood that in case the frame and sash are constructed from metal the plates 5 and 6 may be riveted, or otherwise permanently secured, thereto. A pocket 7 extends obliquely into the frame plate 5 and has a semicircular bot-' tom, at the axis of which is a trunnion seat 8, having an oblique entrance passage 9. The upper edge of the pocket 7 extends tangentially to the-bottom thereof andparallel to the entrance passage 9, afiording a stop surface 10. The junction of the bottom of the pocket 7 frame plate 5 affords a lower stop 11.

Integrally formed with the face of the sash plate 6 is a semicircular lug 12, having a V-shaped projection 13. This lug 12 is axially alined with the pocket 7, of a diameter slightly less than that of said pocket, and is seated therein with its projection 13 i the stops 10 and 11. Integrally formed with the lug 12, and axially alined therewith, is a trunnion 14, arranged to enter the seat 8, through the entrance passage 9, and detachably and removably seated therein. The lug 12 is of a thickness to permit the plates 5 and v6 to and, by reference to Fig. 1, it will be noted that the diameter of this lug is sufficient to completely close the passageway between the stops 2 and 3, e engagement of the lug projection 13 with the stop 11 limits the opening movement of the sash 4. When the sash is closed To persash 4: stops 2 and 3 with the inner edge of the the projection 13 ment 15.

I jacent V trancepassages 9.

' inner dow sash,

engages the stop 10 and, in this position of the lug 12, completely fills the pocket 7. V e

To hold the sash t closed and in different open positions, is provided a spring-held latch and a cooperating lock segment 15, integrally formed with the left hand frame plate 5, as viewed from the inside of the building. By reference to Figs. 3 and 5, it will be noted that the entrance passage 9 extends completely through the lock seg- At the junction of the lock segment 15 with the plate 5 is formed a lock notch 16, and the periphery thereof is position. When either one of the stop shoulders 17. is engaged by the latch bar 18 the sash a is held open in a predetermined set position. The hanging of the sash L from the frame 1*is such that the same will tend to close under the'action of gravity. In the end of the latch bar 18 is formed an eye to which is attached. a latch-releasing cord 21, which is extended through a guide "passage 22 in the casing 19 and-through an' secured tothe lower end of theadside rail. of the sash -Obviously, by pulling on this cord. 21 the latch bar 18 eye 23,

is rocked on its pivot'j against the tensionof' the. spring 20, out of engagement 1 with the lock segment is recessed at 24%, with the lock segment. 15 and affords a clearance passage for the latch'ba'r 18.

When the sash at is open, as shown in Fig, 1', the same may be readily removed from-the window frame by drawing outward thereon, to lift the trunnions 14; laterally out of the seats 8 through the en- While" the drawings show one of the pivot hinges equipped. with a lock segment, it is, of'course, understood that a the same may be dispensed with if a latch is not required.

What we claim is:

1. Thecombination with'a window frame having an innerstop and spaced, the one above the other,.and a wining said sash to said-frame for swinging movement between the, stops, each of said a relatively fixed pivot hinges comprising Copies of this patent maybe the-periphery of the 'T he window frame 1 I which recess is 'concentrlc movement of said lug in an outer stop,

of a pair of pivot hinges connectplate and a relatively movable plate detachably pivoted thereto for edgewise separation, said plates having reversely elf-set surfaces fitted one within the other, affording a substantially tight joint between the plates at their pivotal connection and extending above and below the inner ends of the stops.

2. A pivot hinge comprising a relatively fixed plate and a relatively movable plate,

said fixed plate having a pocket and an open seat, and said movable plate having a. trunnion equipment lug, seated in said pocket with its trunnions journaled in said seat, with freedom for separation therefrom by a lateral movement, said lug filling the pocket in one extreme position of the movable plate and projecting out of the pocket in the other extreme position of said movable plate.

3. pivot hinge comprising a relatively fixed plate and a relatively movable plate, said fixed plate having a pocket, with a semicircular bottom, an entrance passage terminating in a seat at the axis of said pocket, and said movable plate having a semicircular lug seated in said pocket, said lug having a trunnion at its axis journaled in said seat with freedom for separation therefrom by a lateral movement through said entrance passage.

7 '4. A pivot hinge comprising a relatively fixed plate and a relatively movable plate, said fixed plate having an oblique pocket with a semicircular bottom, an oblique entrance passage terminating in a seat at the axis of said pocket, and said movable plate having a semicircular lug with an extension, said lug being seated in said pocket, and having a trunnion at its axis journaled in said seat, the extension on said lug aifording a stop to limit the oscillatory movement of said lug in said pocket.

' 5. A pivot hinge comprising a relatively fixed plate and a relatively movable plate, said fixed plate having an oblique pocket with a semicircular bottom, an oblique entrance passage terminating in a seat at the axis of said pocket, and said movable plate havinga semicircular lug with a V-shaped extension, said lug being seated in said pocket, and having a trunnion at its axis journaled in said seat, the extension on said lug affording a stopto limit the oscillatory said pocket.

In testimony whereof we afiix our signatures in presence of two witnesses.

FRANK l). LARSCHEID. FREDERICK \V. CARLSON. 'JGSEPH FIR-NEE. \Vitnesses EMILY 'MAY KING, HARRY DJ Kimono.

obtained for five cents each, by addressing the Commissioner of Patents.

.Washington, D. C. 

